1. High Quality Sturdy and Durable Construction: This underwater extension arm is made of high quality aluminum alloy, which is waterproof, rust-proof and corrosion-resistant, and can withstand the harsh underwater environment. The carbon fiber double ball arm provides excellent buoyancy, and the extension arm for underwater photography enhances the stability of lighting and precisely positions the light, balancing the lighting settings of the camera flash, and improving the professional quality of underwater photography and video settings. 2. Multi-Purpose: This extension arm is perfect for diving, snorkeling and outdoor activities, which can enhance your underwater lighting system and provide optimal positioning for your video light, flash or diving camera tray. The aluminum alloy underwater extension arm is designed to be versatile and durable, providing a portable underwater photography solution for underwater photographers, diving professionals, diving enthusiasts, snorkelers and spearfishermen, and is an ideal choice for underwater lighting systems. 3. Multi-Purpose Underwater Extension Arm: The 3.5' underwater extension mount provides better stability for your diving camera accessories and can adjust the best light angle to get the photos, videos you want, which is an ideal way to take wonderful underwater photos, and is an ideal underwater extension mount arm for taking wonderful underwater images. 4. Easy Installation and Compatibility: The dual 1' ball extension arm design is lightweight, easy to install and operate, the extension arm dual ball design is compatible with all 1' ball hole clamps and can be connected to other diving accessories, providing multiple connection points, allowing users to easily set up to meet the specific needs of shooting.